26+3= 5×3= 5+43= 5×2=
4×2= 65+8= 4×4= 3×3=
47-6= 70-40= 5×4= 36+24=
口诀:
11+36+950 8268+4+10
7968+9-16 58+860-20+11
8185-29+25 72+8-272+9-1
8.4-5.6= 1.25×0.08= ÷8=
4÷0.2= 50×4%= 7× ÷7× =